EP3524831A1 - Selbstverriegelnde dehnungsfuge für ein möbelstück - Google Patents

Selbstverriegelnde dehnungsfuge für ein möbelstück Download PDF

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Publication number
EP3524831A1
EP3524831A1 EP19155741.2A EP19155741A EP3524831A1 EP 3524831 A1 EP3524831 A1 EP 3524831A1 EP 19155741 A EP19155741 A EP 19155741A EP 3524831 A1 EP3524831 A1 EP 3524831A1
Authority
EP
European Patent Office
Prior art keywords
joint
plug
pin
recess
fixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19155741.2A
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English (en)
French (fr)
Inventor
Roberto Natale Mariani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OMM Srl Dell'ing Roberto Natale Mariani
Original Assignee
OMM Srl Dell'ing Roberto Natale Mariani
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by OMM Srl Dell'ing Roberto Natale Mariani filed Critical OMM Srl Dell'ing Roberto Natale Mariani
Publication of EP3524831A1 publication Critical patent/EP3524831A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
    • F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
    • F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
    • F16B12/24—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using separate pins, dowels, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
    • F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
    • F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
    • F16B12/20—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like
    • F16B12/2009—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like actuated by rotary motion
    • F16B12/2054—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like actuated by rotary motion with engaging screw threads as securing means for limiting movement
    • F16B12/2063—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like actuated by rotary motion with engaging screw threads as securing means for limiting movement with engaging screw threads as tightening means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
    • F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/10—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate gripping parts moved into their final position in relation to the body of the device by a separate operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/10—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of bayonet connections
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2230/00—Furniture jointing; Furniture with such jointing
    • A47B2230/0029—Dowels
    • A47B2230/0033—Expansible dowels or dowel-pins

Definitions

  • the present invention relates in general to joining systems for joining together two panels of a furniture unit or the like. More particularly, it relates to a joint suitable for panels with a non-uniform consistency such chipboard panels or the like.
  • a furniture unit typically comprises two vertical panels (commonly called “flanks” or “shoulders”), a horizontal bottom panel (commonly called “base”) and a top panel which is also horizontal (commonly called “lid”). Furthermore, the furniture unit may comprise a number of horizontal intermediate panels, otherwise known as “shelves”.
  • the shoulders are typically joined together with the bottom panel of the furniture unit and with the top panel.
  • the intermediate panels are usually joined to the shoulders of the furniture unit so as to form shelves and/or reinforce the furniture unit.
  • a shelf of a furniture unit may be a shelf with a single visible edge (also called “single-face” or “blind” shelf) or a shelf with double visible edge (also called “double-face” shelf).
  • a single visible edge also called “single-face” or “blind” shelf
  • a shelf with double visible edge also called “double-face” shelf.
  • first case it consists of a shelf where, when the furniture unit is assembled, only the front edge is visible and the rear edge normally rests against a panel or a wall behind the furniture unit.
  • the second case instead it consists of a shelf which, when the furniture unit is assembled, may have visible both the front edge and the rear edge.
  • WO 2016/199015 and WO 2016/199024 describe joints for furniture units.
  • the Applicant has defined the general aim of providing an expansion joint for joining together two panels, in particular for panels made of wood or chipboard or a non-homogeneous material.
  • Chipboard panels have the characteristic feature, because they are manufactured using pressurized machinery, of having more compact particles in the vicinity of the flat outer surfaces. Close to the outer surface, generally the particles have small dimensions and are more compact than the particles in the central zone which are less compact and have larger dimensions. This means that mountings fixed in the central zone are less secure than mountings fixed in the outermost zone.
  • the Applicant has defined the aim of finding a strong and reliable solution which can be fixed securely in the central zone.
  • the Applicant has defined the aim of providing such a joint which may be supplied preassembled.
  • the Applicant has defined the aim of providing such a joint which may be mounted in position in a panel directly at the factory so that the less work is involved for the assembler, and assembly is easier, quick, precise and reliable.
  • the Applicant has defined the aim of providing such a joint which may be inserted in position in a panel only by exerting a pressing force in a single direction, substantially without rotation.
  • the Applicant has defined the aim of providing such a joint which may be used for a shelf, for a lid of a furniture unit or for its base.
  • the Applicant has defined the aim of providing such a joint which is substantially concealed when the furniture unit is assembled, except for, if necessary, a transverse hole which may be used to insert a tool such as a key for a hex socket, Torx, star head, PH, PZ, flat-head or similar screw.
  • the joint according to the present invention uses a very broad fixing area, namely substantially the whole of the recess formed for receiving the plug. It has been shown from the tests carried out that the extraction resistance is directly proportional to the area occupied, namely the greater the surface area of the plug, the greater is the resistance.
  • At least one of the aims mentioned above is achieved with an expansion joint according to the present invention.
  • the joint comprises a cylindrical body, a plug connected to the cylindrical body by means of a thin collar, a fixing pin and a fixing member inside the body.
  • the joint is configured so that, when it is pressed into the recess, the collar on the plug breaks and the body penetrates inside the plug. This movement causes radial expansion of the plug inside the recess into which it has been inserted.
  • the fixing pin engages securely with the fixing member and locks the radially expanded plug fitted onto the body.
  • an expansion joint for joining a first panel with a second panel comprising:
  • the fixing member preferably comprises a self-locking stop ring for shafts.
  • the fixing member comprises a plurality of self-locking stop rings for shafts, packed together.
  • the joint comprises a first bevel gear and a second bevel gear engaged with the first bevel gear, a transverse shaft integral with the first bevel gear and a longitudinal shaft integral with the second bevel gear such that the rotation of the transverse shaft causes rotation of the longitudinal shaft.
  • the transverse shaft may be accessible from the outside of the body.
  • the transverse shaft comprises a threaded pin.
  • the transverse shaft comprises an internally threaded nut.
  • the front end of the body is configured so as to have a protruding threaded pin comprising two half-pins, wherein said longitudinal shaft comprises a conical end portion configured to cooperate with an inner conical portion of the threaded pin.
  • the joint comprises two plugs, each connected to each of the ends of the body, two fixing pins and two fixing members, one for each fixing pin.
  • the joint comprises a threaded transverse hole in a projecting part of the front end of the body, configured to engage a threaded pin of another joint.
  • the joint also comprises a second body, a second plug and a second fixing member and a central pivot for mutually rotating the bodies with respect to each other.
  • the present invention provides a method of inserting an expansion joint into a recess of a panel, the joint comprising:
  • the joint according to the present invention is particularly suitable for being inserted in a milled slot formed in a panel of a furniture unit or the like.
  • it is designed to be inserted in the lateral thickness of a shelf of a furniture unit so as to connect said shelf to a flank of the said unit.
  • the joint according to the present invention is suitable for use in any material, but is particularly effective when the shelf is made of a non-homogeneous material such as a chipboard panel or an ennobled chipboard panel. These panels are formed by means of the agglomeration of wood shavings.
  • a joint 100 according to the present invention typically comprises a body 10, a plug 20 and a fixing pin 30.
  • the body 10 has a roughly cylindrical shape with a first end (also called outer end) 11 and a second end 12 (also called inner end because during use it is located close to the bottom of the hole in which the joint is inserted).
  • the body 10 is formed by two half-shells 10A and 10B which, when joined together, form a substantially hollow body. The inside of the body 10 and any gearing inside it will be described further below.
  • the body 10 has a roughly circular cross-section, but preferably comprises two diametrically opposite longitudinal strips 13 which form two flat surfaces.
  • the longitudinal strips 13 extend substantially along the whole length of the body 10.
  • the body 10 has a transverse through-hole 15 in the vicinity of the inner end 12 of the body 10.
  • the inner end 12 of the body 10 is tapered and has a pair of diametrically opposite reliefs 16 for retaining the plug 20, as will become clear below.
  • the outer end 11 of the body 10 has preferably a longitudinal hole 17. Preferably it also has a centering incision 18 for the head of a screwdriver or other similar tool.
  • the inner end 12 of the body 10 has preferably a flared longitudinal hole 19.
  • the body 10 may be made of a metallic material such as steel, aluminum, zamak or alloys thereof. Alternatively, the body 10 may be made of structural plastics such as glass-fiber reinforced nylon.
  • the plug 20 has preferably a roughly cylindrical shape with a proximal end 21, a distal end 22 and a side surface 23.
  • the terms “distal” and “proximal” are relative to the inner end 12 of the body 10.
  • the proximal end 21 comprises preferably a collar 25 configured to engage the reliefs 16 of the inner end 12 of the body 10 so that, in a preassembled configuration, the body 10 and the plug 20 are stably connected.
  • the collar preferably has a pre-weakened point (for example a V-shaped notch 251) for favoring breakage thereof in a substantially predictable manner.
  • the distal end 22 comprises a closed face 26, apart from a central hole 27 for the shank 31 of the fixing pin 30.
  • the side surface of the plug 20 comprises a plurality of parallel fins 28.
  • the side surface 23 of the plug 20 has a pair of diametrically opposite longitudinal windows 29 with a size and form similar to that of the longitudinal flat surfaces 13 of the body 10.
  • the plug 20 is preferably made of a thermoplastic material and is preferably obtained by means of molding. Preferably it has a small thickness of the side surface, for example less than 1 mm. Preferably, the thickness at the distal end 22 is greater.
  • the fixing pin 30 has a form similar to that of a rivet, with a cylindrical shank 31 and a head 32 connected to the shank.
  • the head is in the form of a flat disk.
  • a member 40 configured to engage in a substantially irreversible manner the shank 31 of the fixing pin 30 is housed inside the body 10.
  • the member 40 configured to engage in a substantially irreversible manner the shank 31 of the fixing pin 30 comprises a self-locking stop ring for grooveless shafts.
  • the member comprises two, three or more self-locking stop rings 40 for shafts, which are packed together.
  • the stop rings are held in position between the bottom of the body 10 and a first inner rib.
  • the joint 101 is configured to be inserted inside a recess (or milled slot) 201 formed in the thickness of a panel 200 and to connect the panel 200 to a shoulder 210 of a furniture unit by means of a threaded pin 67.
  • the threaded pin 67 is configured to engage an internally threaded bush 300 pre-inserted inside the shoulder 210 of the furniture unit.
  • Figures 5.1 to 5.8 show the joint 101 according to the first embodiment.
  • the body, the plug and the fixing pin are as shown in Figures 1-3 and as described in connection with these figures. Therefore, a detailed description thereof will not be repeated, but the gearing inside the body will be described.
  • the gearing comprise a transverse shaft 60 with a first bevel gear 61 and a longitudinal shaft 63 with a second bevel gear 64 meshing with said first bevel gear 61.
  • the first shaft 60 preferably comprises a cylinder with a through-cavity having a hexagonal cross-section so that it may be rotated by means of a hexagonal socket screw key such as an Allen key 400.
  • the hexagonal through-cavity is situated opposite the transverse through-hole 15 of the body 10.
  • the longitudinal shaft 63 preferably comprises an inner shaft 65 with a hexagonal cross-section connected to the second bevel gear 64 and an outer shaft 66 which is concentric with respect to the inner shaft 65 and is engaged therewith such that the rotation of the inner shaft 65 causes the rotation of the outer shaft 66.
  • the outer shaft 66 terminates with an outer threaded section which forms the said threaded pin 67.
  • the thread may be an M4 or M6 thread.
  • a nut 69 which acts as a shoulder is preferably provided in a middle position along the longitudinal shaft.
  • a cylindrical spring 68 is mounted around said outer shaft 66 and is retained between said nut 69 and a rib 52 ( Fig. 3 ) inside the half-shells 10A and 10B of the body 10. The spring 68 tends to push the threaded pin 67 outwards.
  • the nut 69 is preferably screwed onto a thread of the outer shaft 66.
  • the threaded pin 67 may assume (i) the completely retracted position, namely not projecting from the outer end of the body, (ii) the completely extended position, namely completely projecting from the outer end of the body, or (iii) any intermediate position.
  • the translation of the threaded pin 67 occurs upon rotation of the transverse shaft 60 (accessible via the transverse hole 15 in the body 10). This rotation causes the rotation of the first bevel gear 61, the second bevel gear 64, the inner shaft 65 and the outer shaft 66.
  • Figures 6 show in schematic form the main steps for joining a first panel (shelf) 200 with a second panel (upright or shoulder) 210.
  • the shelf 200 is provided with a recess 201 for receiving the joint 101 according to the invention, and the upright 210 has inserted therein a bush 300 with a threaded hole for receiving the pin 67 of the joint 101 according to the invention.
  • the shelf 200 also has formed therein beforehand a transverse hole 202 in a suitable position.
  • Figures 6.1 and 6.2 show a portion of the shelf 200, the recess 201, the transverse hole 202 and the joint 101 according to the first embodiment.
  • the joint 101 is preassembled and the threaded pin 67 is substantially in its completely retracted position.
  • Figures 6.4 and 6.5 show the joint completely inserted inside the recess.
  • Figures 6.6 and 6.7 are two enlarged views of the zones shown encircled in Figure 6.5 .
  • Figure 6.8 shows the threaded pin 67 completely extracted and screwed inside the hole of the bush 300 of the shoulder 210.
  • the assembler has inserted an Allen key 440 inside the transverse hole 202 of the shelf 200 and has engaged the transverse shaft 60 of the joint 101.
  • the joint 101 is preassembled such that the two windows of the plug are aligned with the two flat surfaces of the body.
  • the two windows also make the transverse hole in the body entirely accessible.
  • the joint according to the first embodiment is very advantageous and practical. Firstly it ensures a strong fixing action because it acts over a broad surface. Among the advantages of the joint there is also the fact that it may be mounted at the factory using special machinery and need not be mounted on-site. Advantageously, the threaded pin is completely retracted. The fact that it does not project facilitates storage and mounting and prevents the threaded pin from scratching or ruining other parts of the furniture unit. Moreover, it allows a furniture unit to be assembled in a confined area.
  • the joint may be mounted only by exerting a pressure in the axial (longitudinal) direction of the body. Rotational movements are not necessary.
  • the joint is completely reversible and the shelf on which it is mounted may be used as an intermediate shelf, as a base or as a top lid.
  • the threaded pin is pushed so as to engage firmly with the threading of the bush in the shoulder.
  • the Applicant has established that only one self-locking stop ring 40 is sufficient to ensure an extraction force of about 60 kg.
  • a configuration with two/three stop rings 40 substantially duplicates/triplicates the value of the extraction force.
  • the configuration with three self-locking stop rings is considered to be the preferred one.
  • the second embodiment 102 is similar to the first embodiment.
  • the difference lies in the fact that the threaded pin 67 comprises a biting thread, like a self-tapping screw used for wood, namely is able to engage directly in the panel.
  • the second embodiment is shown in Figures 7 and 8 .
  • the second embodiment 102 will not be further described, but reference may be made to the detailed description of the first embodiment.
  • the second embodiment has all the advantages of the first embodiment.
  • a further advantage lies in the fact that it is not necessary to insert a bush in the shoulder 210 but, at the most, a receiving hole must be formed in order to facilitate the engagement of the self-tapping thread in the shoulder.
  • the third embodiment 103 is similar to the first embodiment.
  • the difference lies in the fact that the threaded pin 67 is of the expanding type.
  • the front end 11 of the body 10 is configured so as to have a projecting toothed pin 14.
  • the projecting toothed pin 14 is formed by two half-pins 14A and 14B, which form respectively part of the first and second half-shells 10A and 10B.
  • the threaded pin 14 terminates in a conical portion 141 which is open outwards ( Figures 9.2 and 10.10 ).
  • the internal shaft 65 terminates in a conical portion 651 which substantially complements the conical portion 141 of the toothed pin 14. In this way, when the internal shaft moves inwards, it widens the two half-pins 14A and 14B.
  • the toothed pin 14 may be inserted inside a hole 211 formed in the shoulder 210.
  • Figures 10 which have been already partially commented, illustrate the steps for inserting a joint 103 according to the third embodiment inside a recess 201 of a shelf 200 and joining it to a shoulder 210 of a furniture unit.
  • the joint 103 is pressed inside the recess 201 by inserting the plug 20 ( Figures 10.1, 10.2 and 10.3 ). With a further pressing force the body 10 is pushed towards the bottom of the recess 201 ( Figure 10.4 ). This further pressing force causes shearing of the collar 25 and the body 10 moves inside the plug 20. The plug expands radially. When the body 10 reaches the end of its travel movement, the shank 31 of the pin 30 penetrates into the holes 27 and is irreversibly engaged by the self-locking stop rings 40. This locks the bottom of the plug 20 rigidly between the head 32 of the pin 30 and the bottom of the body 10. Therefore the fins of the plug penetrate into the walls of the recess and retain the joint inside the recess, greatly increasing the extraction force, namely the force needed to extract the joint 103 from the recess 201.
  • Figure 10.8 shows a shelf 200 arranged at 90° next to a shoulder 210.
  • a joint 103 has been locked in position inside the shelf and its toothed pin has been inserted inside a corresponding hole in the shoulder.
  • the transverse shaft 60 (which has a hexagonal internal cavity) can be rotated.
  • the rotation of the transverse shaft causes the rotation of the first bevel gear.
  • the rotation of the first bevel gear causes the rotation of the second bevel gear (meshing with the first bevel gear) and consequently of the inner shaft.
  • the rotation of the inner shaft causes the rotation of the outer shaft 65 and the translation of its conical portion 651 ( Fig. 10.10 ). This translation tends to open the two half-pins 14A and 14B away from each other ( Fig. 9.8 ) so that they engage with the walls of the hole, thus locking the shelf to the shoulder.
  • This third embodiment retains substantially all the advantages indicated for the first embodiment except for the fact that the pin 14 is always projecting from the outline of the shelf. In addition, it is not required to insert a bush inside the hole of the shoulder 210.
  • Figure 4D shows a fourth embodiment of the joint 104 according to the present invention.
  • the fourth embodiment 104 will not be further described, but reference may be made to the detailed description of the first embodiment.
  • first embodiment 101 does not have a threaded pin, but an (internally) threaded nut 67.
  • This joint 104 therefore provides a practical and strong solution for equipping a shelf with a threaded hole (the threaded hole inside the nut).
  • Figures 11 show the joint 104 according to the fourth embodiment in the preassembled configuration ( Figures 11.1 - 11.5 ) and in the configuration in which the body 10 is engaged inside the plug 20 ( Figures 11.6 and 11.7 ).
  • Figures from 12.1 to 12.4 illustrate the steps for inserting the preassembled joint 104 inside a recess 201 of a shelf 200. These steps are entirely similar to the corresponding steps of the other embodiments.
  • Figure 12.5 shows the joining together of two panels 200 (for example two shelves) in an end-to-end configuration using a joint 104 according to the fourth embodiment and a joint 101 according to the first embodiment: the threaded pin 67 of the joint 101 is screwed into the threaded hole of the nut 67 of the joint 104. In this way, a strong and removable connection between two panels 200 is provided, even made of a non-homogeneous material.
  • Figure 4E shows a fifth embodiment of the joint 105 according to the present invention.
  • the fifth embodiment 105 will not be further described, but reference may be made to the detailed description of the first embodiment and the partial descriptions of the other embodiments.
  • the joint 105 according to the fifth embodiment is configured to join together in an end-to-end configuration two panels, for example two shelves 200.
  • the joint 105 is shown in the various Figures 13 .
  • the joint 105 comprises a body with at least double the length, two plugs 20 (each one at each end of the body) and two pins 30, in turn at the ends of the plugs 20.
  • the pins 30 and the plugs 20 are entirely similar to those of the other embodiments.
  • the body 10 as mentioned above, has a length (at least) twice that of the body of the preceding embodiments, but the ends of the body are shaped preferably like the inner end of the body of the joint 101, 102, 103 or 104 and retain the collar 25 of its pin 20.
  • Figures 13.6 and 13.7 show the joint 105 after the body 10 has penetrated into the two plugs 20.
  • Figures 14 show the various steps for inserting the joint 105 inside a recess 201 of a first panel 200 and inside a recess 201 of a second panel 200.
  • Figure 14.1 is an enlarged view which shows the joint 105 before it is inserted inside the recesses 200 of the two panels
  • Figure 14.2 shows the joint 105 after the two plugs 20 have been inserted inside the recesses 201.
  • Figure 4F shows a sixth embodiment of the joint 106 according to the present invention.
  • the sixth embodiment 106 will not be further described, but reference may be made to the detailed description of the first embodiment and to the partial descriptions of the other embodiments.
  • the joint 106 according to the sixth embodiment is configured to join together two panels 200 in a 90° configuration.
  • the joint 106 is shown in the various Figures 15 .
  • the joint 106 comprises a body 10, a plug 20 and a fixing pin 30.
  • the body comprises, on its outer end 31, a projecting part with a threaded transverse hole 70. There are no members or mechanisms inside the body.
  • Figures 16 show the various steps for inserting the joint 106 inside a recess 201 of a first panel 200.
  • the joint 106 is designed to cooperate with a joint 101 inserted inside another recess 201 of another panel 200.
  • the two panels are cut at 45°.
  • First the preassembled joint 106 is inserted inside the recess 201 of the first panel 200 and the joint 101 is inserted inside the recess of the second panel. With a further pressing action the joint 106 and the joint 101 are locked inside the respective recesses.
  • the only special measure is that of directing the hole 70 so that it may be engaged by the threaded pin 67 of the joint 101. Engagement of the hole 70 by the pin 67 is shown in Figures 16.4 and 16.5 .
  • Figure 4G shows a seventh embodiment of the joint 107 according to the present invention.
  • the seventh embodiment 107 will not be further described, but reference may be made to the detailed description of the first embodiment and to the partial descriptions of the other embodiments.
  • the joint 107 according to the seventh embodiment is configured to join together two panels 200 in an angled configuration.
  • the joint according to the seventh embodiment is similar to the double joint of the fifth embodiment, but the double body is hinged by means of a central pivot 71.
  • Figures 18 show how to use the joint according to the seventh embodiment.
  • the joints according to the present invention are inserted with a unidirectional pressing movement and without a rotational or screwing movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furniture Connections (AREA)
  • Dowels (AREA)
  • Clamps And Clips (AREA)
EP19155741.2A 2018-02-08 2019-02-06 Selbstverriegelnde dehnungsfuge für ein möbelstück Withdrawn EP3524831A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT201800002497A IT201800002497A1 (it) 2018-02-08 2018-02-08 Giunzione ad espansione autobloccante per un mobile

Publications (1)

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EP3524831A1 true EP3524831A1 (de) 2019-08-14

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EP (1) EP3524831A1 (de)
CN (1) CN110131269A (de)
IT (1) IT201800002497A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220338630A1 (en) * 2019-09-16 2022-10-27 Leonardo S.R.L. Improved support device for furniture shelves
EP4166040A1 (de) 2021-10-12 2023-04-19 O.M.M. S.r.l. dell'Ing. Roberto Natale Mariani Verbindung für zwei möbelplatten

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008076089A2 (en) * 2006-12-19 2008-06-26 Maru Mimarlik Insaat Sanayi Ve Ticaret Limited Sirketi Fastening system with gears for modular construction elements
DE102009043179A1 (de) * 2009-09-26 2011-09-15 Franz Baur Verbindungsvorrichtung
WO2016199015A1 (en) 2015-06-08 2016-12-15 Car S.R.L. Connecting device between components of a piece of furniture
EP3153721A1 (de) * 2015-10-08 2017-04-12 Grass GmbH Duebelanordnung fuer eine vorrichtung zum verbinden zweier moebelelemente

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008076089A2 (en) * 2006-12-19 2008-06-26 Maru Mimarlik Insaat Sanayi Ve Ticaret Limited Sirketi Fastening system with gears for modular construction elements
DE102009043179A1 (de) * 2009-09-26 2011-09-15 Franz Baur Verbindungsvorrichtung
WO2016199015A1 (en) 2015-06-08 2016-12-15 Car S.R.L. Connecting device between components of a piece of furniture
WO2016199024A1 (en) 2015-06-08 2016-12-15 Car S.R.L. Connecting device between components of a piece of furniture, method and apparatus for manufacturing said device
EP3153721A1 (de) * 2015-10-08 2017-04-12 Grass GmbH Duebelanordnung fuer eine vorrichtung zum verbinden zweier moebelelemente

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220338630A1 (en) * 2019-09-16 2022-10-27 Leonardo S.R.L. Improved support device for furniture shelves
US11877657B2 (en) * 2019-09-16 2024-01-23 Leonardo S.R.L. Support device for furniture shelves
EP4166040A1 (de) 2021-10-12 2023-04-19 O.M.M. S.r.l. dell'Ing. Roberto Natale Mariani Verbindung für zwei möbelplatten

Also Published As

Publication number Publication date
IT201800002497A1 (it) 2019-08-08
CN110131269A (zh) 2019-08-16

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